Freelance Api Automation Testing Jobs in Delaware

Job Title :Full Stack Technical Lead 
Location  :Newark ,DE

We are seeking an experienced Full Stack Technical Lead, front-end and API-focused, to lead the design, development, and delivery of scalable, high-performance applications. The ideal candidate has expert-level command of React/TypeScript and micro-frontend (MFE) architecture, strong REST API design skills, and the technical leadership skills to guide engineering teams and drive best practices. Python and AWS experience are valued but not the primary focus of the role.

Key Responsibilities 
Lead the end-to-end technical design and development of full-stack applications, with emphasis on the front-end/UI platform and its supporting APIs. 
Own the micro-frontend (MFE) strategy — module boundaries, shared shell, and Webpack & Module Federation setup across teams. 
Define the UI design system — component libraries, design tokens, and how they're sourced from Figma and propagated to code. 
Set standards for state management across React applications and for CSS architecture at scale. 
Own accessibility (ARIA/WCAG) compliance delivery across all UI surfaces. 
Define UI performance budgets and drive performance/error monitoring rollout in production. 
Design, build, and manage robust RESTful APIs (OpenAPI 3.0) and service integrations, including versioning, lifecycle, and governance. 
Set the strategy for contract testing across producing and consuming teams. 
Direct authentication/authorization delivery using OAuth/OIDC and enforce OWASP security standards for both UI and APIs. 
Design and optimize database queries, indexing, and data access strategies (schema/data modelling not required for this role). 
Set the test automation strategy (Playwright) and quality gates for UI/API releases. 
Ensure application scalability, availability, reliability, and security. 
Collaborate with product, engineering, DevOps, and other stakeholders to translate business requirements into technical solutions. 
Provide technical leadership, code reviews, and mentorship to development team members; run day-to-day delivery of the team including sprint commitments and real-time unblocking. 
Drive engineering best practices including clean code, testing, CI/CD, monitoring, and documentation. 
Champion effective use of AI-assisted development tools (e.g., GitHub Copilot) across the SDLC — coding, code review, testing, and documentation — and set adoption practices for the team. 
Identify technical risks, bottlenecks, and architectural improvements and provide effective solutions. 
Participate in effort estimation, sprint planning, technical roadmaps, and delivery planning. 

Required Skills: 
Expert, hands-on React and TypeScript skills — non-negotiable. 
Proven, hands-on experience with micro-frontend architecture using Webpack and Module Federation — non-negotiable. 
Understanding of software architecture, including scalable, API-based, service-oriented system design. 
Strong hands-on Node.js experience for API and backend services. 
Strong experience designing and developing REST APIs (OpenAPI 3.0) and integrating third-party services; API versioning, security, documentation, and performance best practices. 
Experience with state management patterns (Redux, Context, signals, or equivalent) and CSS architecture at scale. 
Experience working with a UI design system (component libraries, design tokens) and Figma hand-off workflows. 
Working knowledge of ARIA/accessibility (WCAG) standards. 
Solid understanding of OAuth/OIDC and OWASP security practices for both front-end and APIs. 
Experience writing contract tests for APIs. 
Comfortable writing and optimizing SQL queries against relational databases (e.g., PostgreSQL, MySQL) — data modelling/schema design not required. 
Experience with CI/CD pipelines, automated testing (Playwright or similar), and production deployment practices. 
Practical, hands-on experience using AI-assisted coding tools (e.g., GitHub Copilot) in day-to-day development and across the SDLC. 
Experience mentoring and guiding software engineers. 
Strong problem-solving, communication, and stakeholder management skills. 

Preferred Qualifications 
Experience with Python for backend/API development (added advantage, not required) — frameworks such as FastAPI, Django, or Flask. 
Working knowledge of AWS (compute, storage, database, networking, security, monitoring services) — preferred, not mandatory. 
Experience with containerization and orchestration technologies such as Docker and Kubernetes. 
Experience implementing UI A/B testing. 
Exposure to error/performance monitoring tooling (DynaTrace RUM, or similar). 
Experience working in Agile/Scrum development environments. 
Prior work in a regulated or enterprise design-system environment. 
Experience 

8+ years of overall software development experience, with significant experience in front-end/full-stack development, React/TypeScript, micro-frontend architecture, and API design/development.